Graphene Composites and its Application in Environmental Treatment

Graphene, as a new two-dimensional material, is an ideal material for pollutant adsorption because of its large specific surface area and strong adsorption capacity. Moreover, graphene has an ultra-high electron transport capacity and can be used as a carrier of photocatalysis to further treat pollutants, so it has a wide range of applications in the field of environmental governance. However, with the application of graphene in the field of environmental treatment, the shortcomings of graphene are gradually exposed, such as easy aggregation, easy oxidation and biological toxicity. In recent years, in order to better meet the needs of removing pollutants in the environment and solve the shortcomings of graphene, graphene composites came into being. In this paper, three kinds of graphene composites which can solve the problems of easy aggregation, easy oxidation and biological toxicity of graphene are found out from thousands of graphene composites, and the basic properties, preparation methods and applications in environmental treatment are summarized respectively. They are graphene/metal oxide composites, porous foam/graphene oxide composites and graphene oxide/chitosan composites. At the same time, the application of graphene composites in pollutant adsorption and degradation and the problems existing in this process are also introduced in detail.